Citation: Yu-Gang Sun, Tu T. Truong, Yu-Zi Liu, Yong-Xing Hu. Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas[J]. Chinese Chemical Letters, ;2015, 26(2): 233-237. doi: 10.1016/j.cclet.2014.10.012 shu

Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas

1.
Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439, USA

Corresponding author: Yu-Gang Sun,
Received Date: 1 September 2014
Available Online: 29 September 2014
Fund Project:

Microflowers made of interconnected MnO₂ nanosheets have been successfully synthesized in a microwave reactor through a hydrothermal reduction of KMnO₄ with aqueous HCl at elevated temperatures in the presence of superparamagnetic Fe₃O₄@SiO₂ core-shell nanoparticles. Due to the chemical compatibility between SiO₂ and MnO₂, the heterogeneous reaction leads to the spontaneous encapsulation of the Fe₃O₄@SiO₂ core-shell nanoparticles in the MnO₂ microflowers. The resulting hybrid particles exhibit multiple properties including high surface area associated with the MnO₂ nanosheets and superparamagnetism originated from the Fe₃O₄@SiO₂ core-shell nanoparticles, which are beneficial for applications requiring both high surface area and magnetic separation.
- Microwave synthesis,
- Manganese oxide nanosheets,
- Superparamagnetic nanoparticles,
- Hybrid nanostructures,
- Multifunctional nanostructures
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沈阳化工大学材料科学与工程学院沈阳 110142

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Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas